What Is Gloss Meter?
Gloss is a superficial luster or shine of objects which has a large psychological impact on consumers. Manufactures design their products to have attractive appearance and maximum appeal. Gloss is determined by projecting a beam of light at a fixed intensity and angle onto a surface and measuring the amount of reflected light at an equal but opposite angle. A gloss meter (glossmeter) is an instrument which is used to measure specular reflection of a surface.
Which Angle Should I Use for My Application?
There are a number of different geometries available for gloss measurement, each being dependent on the type of surface to be measured. For non-metals (coatings, plastics), the amount of reflected light increase with a greater angle of illumination, as some of the light penetrates the surface and is absorbed into it or diffusely scattered from it depending on its colour. metals have much higher reflection and are therefore less anglarly dependent. As gloss meter industry technical standards, ISO 2813 and ASTM D526 (most commonly used standards) describe three measurement angles to measure gloss across all surfaces.
60* is referred to as the universal measurement angle. Its measuring range cover 10-70GU, called semi gloss.
20* is the angle selected for high gloss application. The measuring rang >70GU.
85* is used for low/matt surface. The measuring rang <10GU.
Many international technical standards are available that define the method of use and specifications for different type of gloss meter (glossmeter) used on various type of materials including paint, ceramics, paper, metals and plastics. Many industries use gloss meter (glossmeter) in their quality control to measure the gloss of product to ensure consistency in manufacturing processes.